Every girl knows the first thing you wanna do when you break up with your boyfriend is to get a new look -- usually a new 'do. You either go shopping for a sexy outfit or you change your hair, or both.

Well, Katy Perry can afford to go to celeb stylist Chris McMillian (Jennifer Aniston's man), so she puts her trust in him, tells him to do something dramatic and this is what happens ... and we love it! I mean, girlfriend's already go her nose pierced, so why not take the plunge and chop the hair off! It looks great!

She also expressed herself verbal in a Tweet meant to shut down rumors for the reason behind their split -- no cheating, no hating: "HOW BOUT A NEW WAY OF THINKING FOR 2017!?” the singer, 32, wrote. “U can still b friends & love ur former partners! No one’s a victim or a villain, get a life y’all!"